Continuity mistake: When Jason is impersonating the God Who Comes, the position of the blue rope tying Sam to the roof of the car, keeps changing position between shots. For example, when Mike Spencer says, "You're the God Who Comes?", the rope is under Sam's chest; in other shots, it's behind his neck. (00:33:30)Kylantha
Character mistake: When Bill mentions to Sophie-Anne that drinking the maenad's blood poisoned him, she says that vampires can only feed off human blood. However, across the show, we've seen vampires drink from fairies, werewolves and even the blood of other vampires, like Lilith's blood. (00:05:50)Kylantha
Plot hole: In the episode where Jessica went home to her family's house in season 2, Bill said "someone who lives here must invite me in." In this episode, Russell Edgington's wolf (Coota) invites Russell into Alcide's apartment. Also, in Season 6 Sarah Newlin recinds Jessica's invitation into Jason's house (which only Jason should be able to do).
Continuity mistake: When Jason is talking to Andy at the Merlottes', he sticks his fork backwards into his sandwich. A couple of shots later, the fork has mysteriously disappeared, and there's not even a hole or mark in the sandwich. The fork reappears a few shots later. (00:36:10)Kylantha
Continuity mistake: When Jason is confronted by the son of Sharon Singer at the sheriff's office, his arms keep changing position; most notably, when the kid attacks him, Jason's right arm goes from being over the kid's arm to being pinned between shots. (00:25:30)Kylantha
Continuity mistake: When Sookie points the shotgun at Debbie and says, "Get out of my house, bitch", she fires the weapon and blows the doll's house by the window to bits. The damage to the doll's house and the debris surrounding it changes dramatically between shots. For example, when the house explodes, the entire roof comes off, but the back wall is still intact; a couple of shots later, most of the back wall is missing and parts of the roof are undamaged. (00:51:40)Kylantha
Continuity mistake: After Sookie discovers that the rednecks are plotting to kill the vampires, as she attempts to get Sam to intervene, Sam places two mugs of beer on the counter. The mugs keep alternating between being full and half full between shots. (00:39:00)Kylantha